U.S. patent application number 13/813791 was filed with the patent office on 2013-05-23 for pump.
The applicant listed for this patent is Philip Owain Lloyd Davies, Thomas Herrmann, Gunther Erich Schmid, Simon Spear. Invention is credited to Philip Owain Lloyd Davies, Thomas Herrmann, Gunther Erich Schmid, Simon Spear.
Application Number | 20130129535 13/813791 |
Document ID | / |
Family ID | 44543205 |
Filed Date | 2013-05-23 |
United States Patent
Application |
20130129535 |
Kind Code |
A1 |
Schmid; Gunther Erich ; et
al. |
May 23, 2013 |
PUMP
Abstract
A pump for conveying a fluid comprises a pump housing (1) with a
fluid inlet (26), a pumping chamber (4), which has a flow
connection to the fluid inlet (26), and a fluid outlet (25), which
has a flow connection to the pumping chamber (4). The pump
furthermore has a drivable pump body (2), which at least partially
limits the pumping chamber (4), and a pump body drive device. The
pump body drive device comprises a pump body drive mechanism (3)
which is connected to the pump body (2) and which comprises a first
drive magnet (16) and is moveable along a displacement path, and a
second drive magnet (11) arranged adjacent to the pump body drive
mechanism (3) for moving the pump body drive mechanism (3) along
the displacement path. The pump also comprises an actuable fixing
device (33) for fixing the pump body drive mechanism (3), which, in
a release position, releases the pump body drive mechanism (3) and,
in a fixing position, fixes the pump body drive mechanism (3).
Inventors: |
Schmid; Gunther Erich;
(Munchen, DE) ; Spear; Simon; (Ottobeuren, DE)
; Davies; Philip Owain Lloyd; (Farnham, GB) ;
Herrmann; Thomas; (Munchen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Schmid; Gunther Erich
Spear; Simon
Davies; Philip Owain Lloyd
Herrmann; Thomas |
Munchen
Ottobeuren
Farnham
Munchen |
|
DE
DE
GB
DE |
|
|
Family ID: |
44543205 |
Appl. No.: |
13/813791 |
Filed: |
August 4, 2011 |
PCT Filed: |
August 4, 2011 |
PCT NO: |
PCT/EP11/63239 |
371 Date: |
February 1, 2013 |
Current U.S.
Class: |
417/395 |
Current CPC
Class: |
F04B 43/02 20130101;
F04B 45/047 20130101; H02K 7/14 20130101; F04B 35/04 20130101; F04B
43/021 20130101; F04B 45/043 20130101; F04B 39/14 20130101; F04B
43/04 20130101; H02K 33/16 20130101; F04B 35/045 20130101; F04B
53/22 20130101; F04B 43/0054 20130101 |
Class at
Publication: |
417/395 |
International
Class: |
F04B 43/02 20060101
F04B043/02 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 4, 2010 |
DE |
102010038871.8 |
Claims
1. Pump for conveying a fluid, comprising a) a pump housing (1), b)
with at least one fluid inlet (26), c) with at least one pumping
chamber (4), which has a flow connection to the at least one fluid
inlet (26), and d) with at least one fluid outlet (25), which has a
flow connection to the at least one pumping chamber (4), e) at
least one drivable pump body (2), which f) at least partially
limits the at least one pumping chamber (4), g) at least one pump
body drive mechanism, which has h) at least one pump body drive
mechanism (3) connected to the at least one pump body (2) for
driving the at least one pump body (2), wherein the at least one
pump body drive mechanism (3) is movable along a displacement path,
and characterised by i) at least one actuatable fixing device (33;
33a; 33b; 33c) for fixing the at least one pump body drive
mechanism (3), wherein the at least one fixing device (33; 33a;
33b; 33c) j) in a release position, releases the at least one pump
body drive mechanism (3), wherein the at least one pump body drive
mechanism (3) is then movable along its displacement path, and k)
in a fixing position, fixes the at least one pump body drive
mechanism (3) and an exchange of the at least one pump body (2) is
possible, l) can be actuated by at least one actuating device (32;
32a; 32b; 32c) which is actuably mounted on the pump housing (1),
and m) comprises at least one fixing part (47, 87; 47a; 47b; 47c)
which can be displaced by the at least one actuating device (32;
32a; 32b; 32c) for fixing the at least one pump body drive
mechanism (3), being movable between the release position and the
fixing position, and in its fixing position, fixes the at least one
pump body drive mechanism (3) at least in the direction of its
displacement path.
2. Pump for conveying a fluid, comprising a) a pump housing (1), b)
with at least one fluid inlet (26), c) with at least one pumping
chamber (4), which has a flow connection to the at least one fluid
inlet (26), and d) with at least one fluid outlet (25), which has a
flow connection to the at least one pumping chamber (4), e) at
least one drivable pump body (2), which f) at least partially
limits the at least one pumping chamber (4), g) at least one pump
body drive mechanism, which has h) at least one pump body drive
mechanism (3) connected to the at least one pump body (2) for
driving the at least one pump body (2), wherein the at least one
pump body drive mechanism (3) is movable along a displacement path
i) at least one actuatable fixing device (33; 33a; 33b; 33c) for
fixing the at least one pump body drive mechanism (3), wherein the
at least one fixing device (33; 33a; 33b; 33c) j) when the pump is
in an operating state, is in a release position, wherein in the
release position, the at least one pump body drive mechanism is
movable along its displacement path, and k) in a fixing position,
centers the at least one pump body drive mechanism in the direction
of its displacement path, and also transversely to its displacement
path, and further fixes the at least one pump body drive mechanism
in the direction of its displacement path, and in the direction
transverse to its displacement path, l) wherein the at least one
pump body (2) may be removed from the at least one pump body drive
mechanism with the at least one pump body drive mechanism being
maintained in the fixing position by the at least one fixing device
(33; 33a; 33b; 33c).
3. Pump according to claim 2, wherein the fixing device (33; 33a;
33b; 33c) can be actuated by at least one actuating device (32;
32a; 32b; 32c), which is actuably mounted, preferably pivotably, on
the pump housing (1), the at least one actuating device (32; 32a;
32b; 32c) preferably comprising at least one actuating means (36)
for the actuation thereof.
4. Pump according to claim 3, wherein the fixing device (33; 33a;
33b; 33c) comprises at least one fixing part (47, 87; 47a; 47b;
47c) which can be displaced by the actuating device (32; 32a; 32b;
32c) for fixing the pump body drive mechanism (3), the at least one
fixing part (47, 87; 47a; 47b; 47c) being movable between the
release position and the fixing position.
5. Pump according to claim 1, wherein the fixing part (47, 47a;
47b; 47c), in its fixing position, fixes the pump body drive
mechanism (3) at least in the direction of its displacement
path.
6. Pump according to claim 1, wherein at least one actuable
centering part (48; 48a; 48b, 73; 48c) for centering the pump body
drive mechanism (3), wherein the at least one centering part (48;
48a; 48b, 73; 48c) preferably has at least one centering flank for
interaction with the pump body drive mechanism (3).
7. Pump according to claim 6, wherein the centering part (48; 48a;
48b; 48c) centers the pump body drive mechanism (3) in the
direction of its displacement path.
8. Pump according to claim 6, wherein the centering part (48; 48a;
73; 48c) centers the pump body drive mechanism (3) transversely to
its displacement path.
9. Pump according to any one of claims claim 6, wherein the
centering part (48; 48a; 48b, 73; 48c) is connected to the fixing
device (33; 33a; 33b; 33c).
10. Pump according to claim 1, wherein the fixing device (33a) has
at least one wedge mechanism (58), the at least one wedge mechanism
(58) having a coupling wedge (59), which can be actuated by the
actuating device (32a), and the fixing part (47a), which interacts
with the coupling wedge (59) and is configured in a wedge-like
manner, at least one spring element (70) also preferably being
provided to move the fixing part (47a) into its release
position.
11. Pump according to claim 1, wherein the fixing device (33b) has
at least one encompassing body (47b) to at least partially
encompass the pump body drive mechanism (3), the at least one
encompassing body (47b) preferably having at least one encompassing
receiver (75).
12. Pump according to claim 1, wherein the fixing part (47a; 47b;
47c) and the actuating device (32a; 32b; 32c) are coupled to one
another by at least one link arrangement, the at least one link
arrangement having at least one link pin (71; 71c) and at least one
link (54; 54b; 54c) for guiding the at least one link pin (71;
71c).
13. Pump according to claim 12, wherein the link (54; 54b; 54c) has
at least one link pin actuating portion (56; 56b; 56c) for
actuating the link pin (71; 71c), the link (54; 54b; 54c)
preferably also having a fixing portion (57; 57b) for locally
securing the link pin (71; 71c).
14. Pump according to claim 13, wherein the link pin (71c) forms
the fixing part (47c).
15. Pump according to claim 1, wherein the actuating device (32)
and the fixing device (33) are rigidly connected to one another,
the fixing part (47) preferably being configured as a fixing face
for resting on the pump body drive mechanism (3).
16. Pump according to claim 15, wherein the actuating device (32)
comprises at least one resilient spring means (50), which, in the
fixing position of the fixing part (47), rests on the pump body
drive mechanism (3) for holding the actuating device (32) in its
fixing position.
Description
[0001] The invention relates to a pump, in particular a diaphragm
pump, for conveying a fluid. The fluid to be conveyed is taken to
mean a medium to be conveyed, such as a liquid, a gas, a gas
mixture or a liquid/gas mixture. The pump is preferably used in
continuous operation in small sewage plants. Small sewage plants of
this type are often used to purify waste water in buildings which
do not have their own sewage system connection. The pump is
preferably used to introduce air into the waste water. The waste
water is thus enriched with oxygen. Bacteria are thus activated for
the biological or bacterial purification of the waste water. The
pump is therefore preferably an aeration pump.
[0002] A large number of pumps are known from the prior art and are
used in small sewage plants, for example. The disadvantage in these
known pumps is that their wearing parts--such as their
diaphragm--often have to be exchanged after a few years. The
exchange of the wearing parts is relatively time-consuming
Technical skill is generally necessary to exchange the wearing
parts.
[0003] The invention is therefore based on the object of providing
a pump, the wearing parts of which can be exchanged particularly
easily and quickly.
[0004] This object is achieved according to the invention by the
features disclosed in claim 1. The core of the invention is that
the at least one pump body drive mechanism can be locally fixed by
the at least one fixing device. In particular, this prevents the
fixed pump body drive mechanism being able to unintentionally move
or be moved during maintenance work. A simple exchange of a pump
body is thus possible, for example,
[0005] For example, during maintenance work, it can thus also be
prevented that a pump body drive mechanism comprising at least one
drive magnet is attracted by at least one stationary drive magnet
and is fixed thereto. The release of the magnets is generally very
difficult. A pump body drive mechanism of this type preferably has
at least a first drive magnet. It is advantageous if the at least
one pump body drive device furthermore has at least one second
drive magnet arranged adjacent to the at least one pump body drive
mechanism to move the at least one pump body drive mechanism along
the displacement path. Another configuration of the pump body drive
device is alternatively possible.
[0006] The at least one pump body may, for example, be configured
as a diaphragm. However, it may also be a piston. Two pump bodies
are preferably provided. It is also advantageous if two fixing
devices are provided. These can preferably be actuated
independently of one another. The fixing devices may, however, also
be coupled to one another for common actuation.
[0007] Further advantageous configurations are disclosed in the
sub-claims.
[0008] The configuration according to claim 2 allow simple
actuation or handling of the fixing device. An actuating device is
preferably provided for each fixing device. However, two fixing
devices may also be actuated by one actuating device. The actuating
device may be displaceably or pivotably mounted on the pump
housing. It preferably comprises at least one actuating means.
Examples of possible actuating means are an actuating handle or a
handle trough. The actuating means may, however, have been produced
by knurling. The actuating device may be mounted on the inside or
outside of the pump housing. With inside mounting of the actuating
device, the actuating means is preferably configured as an
actuating handle or lever, which can then project from the pump
housing through a recess formed in the pump housing.
[0009] The configuration according to claim 3 leads to an extremely
functionally reliable fixing of the pump body drive mechanism. The
fixing part may engage, preferably positively, in the pump body
drive mechanism. The pump body drive mechanism then preferably has
at least one corresponding recess or opening for this. The fixing
part may, however, also rest on the outside of the pump body drive
mechanism. It may rest thereon laterally or on the end face. The
fixing part may, however, also partially encompass the pump body
drive mechanism in a clamp-like manner Each fixing device
preferably has one or two fixing parts.
[0010] The configuration according to claim 4, in a functionally
reliable manner, prevents a further displacement of the pump body
drive mechanism along its displacement path. The pump body drive
mechanism may also be fixed, however, alternatively or
additionally, transverse to its displacement path. The at least one
fixing part is preferably configured in such a way that, in its
fixing position, it fixes the pump body drive mechanism in the
direction of its displacement path and preferably also transverse
to its displacement path. The fixings acting in different
directions can be achieved by common fixing parts or by fixing
parts which are separate from one another.
[0011] The configuration according to claim 5 allows an extremely
precise placing of the pump body drive mechanism. It can thus be
guided precisely to its desired fixing position.
[0012] The configurations according to claims 6 and 7 lead to an
extremely precise placing of the pump body drive mechanism.
[0013] The configuration according to claim 8 results in an
extremely high functional reliability. Moreover, a pump of this
type is extremely easy to handle during maintenance.
[0014] The configuration according to claim 9 produces an extremely
functionally reliable fixing device. The coupling wedge and the
fixing part configured in the manner of a wedge have a sliding
connection with one another by means of their wedge faces. An
actuation of the coupling wedge leads to a movement of the fixing
part, whereby a movement deflection takes place. Two wedge
mechanisms per fixing device are preferably provided. Each fixing
device preferably also has two fixing parts, it being possible for
a spring element to be provided between these fixing parts for the
movement thereof into their release position. The spring element
may be configured as a leaf spring, helical spring, elastomer
spring or as a spring block. Instead of spring elements,
corresponding guides may also be provided, which bring about a
return of the fixing parts. A swallowtail guide may, for example,
be used for this. The fixing parts, in the fixing position,
preferably rest laterally on the pump body drive mechanism.
[0015] The configuration according to claim 10 also leads to an
extremely reliable fixing of the pump body drive mechanism. The
encompassing body, in the fixing position, preferably encompasses
the pump body drive mechanism in the region of its longitudinal
sides. A positive connection is preferably present between the
encompassing body and the pump body drive mechanism.
[0016] The configuration according to claim 11 leads to an easy and
functionally reliable actuation of the fixing part. The link is
preferably configured in or on the actuating device, while the link
pin is connected to the fixing part. According to an alternative
embodiment, the link is configured on the fixing part, while the
link pin is provided on the actuating device.
[0017] The configuration according to claim 12 is particularly
operationally reliable.
[0018] The configuration according to claim 13 has an extremely
simple structure. The link is then preferably configured as a link
cam or control cam. A spring element, which brings the fixing part
into contact with the link cam, is preferably associated with each
fixing part.
[0019] The configuration according to claim 14 is again extremely
simple with regard to structure. It is also extremely
assembly-friendly and functionally reliable.
[0020] The configuration according to claim 15 leads to an
extremely high operating reliability.
[0021] Four embodiments of the invention will be described below by
way of example with reference to the accompanying drawings, in
which:
[0022] FIG. 1 shows a perspective view of a pump according to the
invention in accordance with a first embodiment,
[0023] FIG. 2 shows a section through the pump shown in FIG. 1,
[0024] FIG. 3 shows an exploded view of the pump shown in FIGS. 1
and 2,
[0025] FIG. 4 shows a view which shows the actuating device or
fixing device of the pump shown in FIGS. 1 to 3,
[0026] FIG. 5 shows a section along the section line V-V shown in
FIG. 4,
[0027] FIGS. 6 and 7 show sections through the pump shown in FIGS.
1 to 3, the pump body drive mechanism being released.
[0028] FIG. 8 shows a view of the pump shown in FIGS. 1 to 3, the
fixing device being located in its centring position,
[0029] FIG. 9 shows a section along the section line IX-IX in FIG.
8,
[0030] FIGS. 10 and 11 show sections through the pump shown in
FIGS. 1 to 3, the fixing device being located in its fixing
position,
[0031] FIG. 12 shows a perspective view of a pump according to the
invention, in accordance with a second embodiment,
[0032] FIG. 13 shows an exploded view of the pump shown in FIG.
12,
[0033] FIG. 14 shows a perspective view of the fixing devices, the
actuating devices and the pump body drive mechanism of the pump
shown in FIGS. 12 and 13,
[0034] FIG. 15 shows a perspective view of the actuating device of
the pump shown in FIGS. 12 and 13,
[0035] FIG. 16 shows a view of the pump shown in FIGS. 12 and 13,
the fixing device being in its release position,
[0036] FIGS. 17 and 18 show sections through the pump shown in
FIGS. 12 and 13, the fixing device being in a centring
position,
[0037] FIG. 19 shows a section through the pump shown in FIGS. 12
and 13, the fixing device being in its fixing position,
[0038] FIG. 20 shows a perspective view of a pump according to the
invention in accordance with a third embodiment,
[0039] FIG. 21 shows a section through the pump shown in FIG.
20,
[0040] FIG. 22 shows a further section through the pump shown in
FIG. 20, the pump body drive mechanism being released,
[0041] FIG. 23 shows a perspective view of the actuating device of
the pump shown in FIGS. 20 to 22,
[0042] FIG. 24 shows a perspective view of the fixing devices and
the actuating device of the pump shown in FIGS. 20 to 22,
[0043] FIG. 25 shows a section corresponding to FIG. 22, the fixing
devices being in their fixing position,
[0044] FIG. 26 shows a perspective view of a pump according to the
invention in accordance with a fourth embodiment,
[0045] FIGS. 27 and 28 show sections through the pump shown in FIG.
26, the pump body drive mechanism being released,
[0046] FIG. 29 shows a perspective view of the fixing devices shown
in FIGS. 26 to 28, the actuating devices and the pump body drive
mechanism,
[0047] FIG. 30 shows a section through the fixing devices, the
actuating devices and the pump body drive mechanism of the pump
shown in FIG. 26, the pump body drive mechanism being released,
[0048] FIG. 31 shows a section corresponding to FIG. 30, the fixing
devices being in their centring position, and
[0049] FIG. 32 shows a section corresponding to FIGS. 30 and 31,
the fixing devices being in their fixing position.
[0050] A first embodiment of the invention will be described below
with reference to FIGS. 1 to 11. A pump according to the first
embodiment comprises a pump housing 1, diaphragms 2 and a diaphragm
drive mechanism 3 for actuating the diaphragms 2. The diaphragms 2
and the diaphragm drive mechanism 3 are housed in the pump housing
1. The diaphragms 2 and the pump housing 1 together limit pumping
chambers 4, which can be changed with regard to their volume. The
diaphragms 2 are flexible and impermeable to fluid. By actuating
the diaphragms 2 by the diaphragm drive mechanism 3, a fluid is
conveyed by changing the volume of the pumping chambers 4. The
diaphragms 2 form pump bodies, while the diaphragm drive mechanism
3 is a pump body drive mechanism.
[0051] The pump housing 1 comprises a panel 5, which is U-shaped in
design. The panel 5 therefore has a U-base 6 and two U-legs 7
projecting perpendicularly from the U-base 6. The open sides of the
panel 5 are in each case closed when the pump is assembled.
Opposing the U-base 6, a first panel cover (not shown) is provided
for this. Furthermore, two second panel covers (not shown) are
provided, which then oppose one another and rest laterally on the
U-base 6 and the U-legs 7. The panel covers are preferably screwed
to the panel 5 by screws. They together form a U-shape, the first
panel cover forming the U-base. The U-base 6, the U-legs 7 and the
panel covers are plate-shaped in each case. They together limit a
cuboid receiving space 8 and together form the pump housing 1.
[0052] Provided in the receiving space 8 are two yokes 9, which are
arranged spaced apart from one another and are preferably formed
from an iron material. The yokes 9 are fastened to the panel 5.
They are preferably fixed to the U-base 6. Each yoke 9 is E-shaped
and therefore has a central, finger-like projection 10. Wound
around each projection 10 is a coil 11, by which electrical current
can be carried. The projections 10 in each case form a core for the
coils 11 and run toward one another. The yokes 9 and the coils 11
form electric drive magnets 12.
[0053] Arranged between the yokes 9 and the associated coils 11 is
the diaphragm drive mechanism 3, which is configured as an
armature, shuttle or the like. The armature 3 is moveable and
plate-like. It has a rectangular, elongate shape and therefore a
longitudinal centre axis 13. The armature 3 can be axially
displaced along its longitudinal centre axis 13. It comprises a
frame 14 with two window-like openings 15, which are arranged next
to one another in the direction of the longitudinal centre axis 13.
A permanent magnet 16 is inserted in each opening 15. Opposite
poles of the permanent magnets 16 are arranged next to one
another.
[0054] The permanent magnets 16 of the armature 3 are located in a
magnetic field, which is produced by the electric drive magnets 12
when the coils 11 are provided with current. By providing the coils
11 with current, the armature 3 is moved axially between the yokes
9. The armature 3 then oscillates along its longitudinal centre
axis 13. It moves, in this case, alternately in the direction of
the mutually opposing U-legs 7.
[0055] The diaphragms 2 are fastened to the mutually opposing
longitudinal ends of the armature 3. The centres of the diaphragms
2 are in this case fixed to the armature 3. For this purpose,
compression discs may be provided on the armature 3 and rest on the
inside of the diaphragms 2. On the outside, fixing discs rest on
the diaphragms 2 and are screwed to the associated compression
discs.
[0056] Configured in each U-leg 7 is an opening 17 which completely
passes through the U-leg 7. The openings 17 are circular and oppose
one another. Their centre point is located on the longitudinal
centre axis 13 of the armature 3 when the pump is assembled.
[0057] A pump head 18, which is a component of the pump housing 1,
is associated with each opening 17. Each pump head 18 comprises a
chamber part 19, which is configured in a shell-like manner and is
held by screws on the outside on the respective U-leg 7. The pump
heads 18, when the pump is assembled, oppose one another. The
chamber part 19 in turn has a diaphragm clamping region 20, which
runs round the respective opening 17 and rests closely on the
outside of the respective U-leg 7. Furthermore, each chamber part
19 has a valve receiving region 21, which is arranged spaced apart
from the respective U-leg 7 with the formation of the respective
pumping chamber 4. Each chamber part 19 furthermore has a
peripheral wall 22, which connects the diaphragm clamping region 20
and the valve receiving region 21 to one another. The chamber part
19 tapers from the diaphragm clamping region 20 in the direction of
the valve receiving region 21.
[0058] A pressure valve receiver 23 and a suction valve receiver 24
are formed in each valve receiving region 21. The pressure valve
receiver 23 is arranged adjacent to a pressure opening 23, while
the suction valve receiver 24 is placed adjacent to a suction
opening 26. The pressure opening 25 and the suction opening 26 are
in each case arranged in the valve receiving region 21 and pass
through it completely.
[0059] Furthermore, each pump head 18 comprises a valve cover 27,
which is placed tightly onto the outside of the respective chamber
part 19 and adjoins the valve receiving region 21. The valve cover
27 is screwed to the respective chamber part 19. In this case, the
valve cover 27 holds a suction valve plate 28 in the suction valve
receiver 24. The suction valve plate 28 can close the suction
opening 26. Moreover, the valve cover 27 holds a pressure valve
plate 29 in the pressure valve receiver 23. The pressure valve
plate 29 can close the pressure opening 25. The valve plates 28, 29
can be moved between a closing position, in which the opening 26 or
25 is released. They are pressure-controlled. Each valve cover 27
moreover has a pressure line 30 and a suction line 31. The pressure
lines 30 have a flow connection with the pressure openings 25,
while the suction lines 31 have a flow connection to the suction
openings 26.
[0060] The pump furthermore comprises two actuating devices 32.
Each actuating device 32 is non-rotatably connected to a fixing
device 33. The actuating devices 32 and the associated fixing
devices 33 are in each case preferably configured in one piece.
They form actuating/fixing units. The actuating/fixing units are
cylinder-like in design. They each have a centre axis 34. The
actuating/fixing units oppose one another when the pump is
assembled.
[0061] Each actuating device 32 comprises an annular contact web 35
and an actuating handle 36 projecting radially from the contact web
35. The contact webs 35 in each case have an outer face 37 and an
inner face 38 opposing the outer face 37. The external diameter of
the contact webs 35 is larger than the diameter of the openings 17.
When the pump is assembled, the inner faces 38 rest adjacent to the
openings 17 on the U-legs 7 on the outside. The inner faces 38 of
the actuating devices 32 face one another here. The diaphragms 2
rest on the outer faces 37 of the actuating devices 32. They are
held there by the chamber parts 19, which are screwed to the pump
housing 1 or to the respective U-leg 7.
[0062] Alternatively, the contact webs 35 may rest on the U-legs 7
on the inside.
[0063] Each fixing device 33 comprises a base body 39, which
adjoins the inner face 38 of the respective contact web 35. The
base bodies 39 in each case have an external diameter, which is
slightly smaller than the diameter of the openings 17. When the
pump is assembled, the base bodies 39 project through the openings
17 into the receiving space 8 and rest on the limit wall 40 which
limits the respective opening 17 and then forms a bearing face.
[0064] Each base body 39 is point-symmetrical with respect to its
centre of symmetry and has an elongate, rectangular, window-like
opening 41, which completely axially passes through the latter and
goes through the centre axis 34. Each opening 41 has a first
longitudinal end 42 and a second longitudinal end 43, which opposes
the first longitudinal end 42. The longitudinal ends 42, 43
substantially run adjacent to the contact web 35. The openings 41
furthermore in each case have two mutually opposing longitudinal
sides 44, 45. The openings 41 divide the base body 39 substantially
into two halves. The spacing of the longitudinal sides 44, 45 with
respect to one another is slightly larger than the width of the
armature 3. The spacing of the longitudinal ends 42, 43 with
respect to one another is slightly larger than the height of the
armature 3.
[0065] Each base body 39 has an inside 46, which, when the pump is
assembled, projects into the receiving space 8 and is remote from
the associated contact web 35. Each base body 39, on the inside 46,
has a contact face 47, which runs parallel to the contact web 35
and forms a fixing part for the axial fixing of the armature 3.
[0066] Two centring flanks 48, which adjoin the longitudinal side
44 or 45 of the respective opening 41, are also provided on each
base body 39 on the inside 46 thereof The centring flanks 48 issue
from the contact face 47 of the respective base body 39. They run
obliquely to the contact base 47. A centring flank 48 is located
adjacent to the first longitudinal end 42 and the second
longitudinal side 45. The other centring flank 48, on the other
hand, is arranged adjacent to the second longitudinal end 43 and
the first longitudinal side 44. The centring flanks 48 run from the
contact face 47 in the direction of the centre axis 34. They oppose
one another obliquely.
[0067] Furthermore, two opening bulges 49 adjoin each opening 41
and are provided in the region of the centre axis 34 in the base
body 39. A spring arm, which is connected to the respective base
body 39, springs into each opening bulge 49. The spring arms 50 are
arcuate. They extend in a curved manner around the centre axis 34.
They can be radially deflected.
[0068] The opening bulges 49 are, in each case, laterally limited
by inner contact flanks 87, which are provided on the base body 39
and extend adjacent to the free ends of the spring arms 50. The
contact flanks 87 extend parallel to one another. Each contact
flank 87 borders on a longitudinal side 44 or 45 of the respective
opening 41 and extends in the base body over a thick region thereof
The contact flanks 87 extend perpendicular to the contact faces
47.
[0069] The function of the pump will be described below. By
providing the coils 11 with current, the latter produce a magnetic
field. The armature 3, which comprises the permanent magnets 16, is
located in the magnetic field. The permanent magnets 16 also
produce a magnetic field. The permanent magnets 16 and the electric
drive magnets 12 together form a pump body drive device or a
diaphragm drive device. The armature 3 is provided with an
oscillating movement by the magnetic fields along its longitudinal
centre axis 13. In the process, it is displaced along a
displacement path. The armature 3 moves in two different
directions, which, are opposed or in opposite directions to one
another.
[0070] Owing to the oscillating movement of the armature 3, two
diaphragms 2 are actuated alternately. The centres of the
diaphragms 2 are alternately pressed into the chamber parts 19 and
then drawn into the receiving space 8, so a fluid to be conveyed is
conveyed.
[0071] The fluid to be conveyed is sucked via at least one panel
cover into the pump housing 1 by the diaphragms 2. In the pump
housing 1, the fluid flows via at least one part region along the
yokes 9. It is then drawn into the suction lines 31. Via the
suction openings 26, which form fluid inlets, the fluid arrives in
the respective pumping chamber 4. The fluid, in the process, passes
the respective suction valve plate 28, which is then located in its
release position. The pressure openings 25 are, in this case,
closed by the pressure valve plates 29. The fluid then leaves the
pumping chambers 4 via the pressure openings 25, which form fluid
outlets. The suction valve plates 28 prevent an unintentional
return of the fluid into the suction lines 31. The fluid passes the
respective pressure valve plate 29, which is then in its release
position. It then arrives in the pressure lines 30. The fluid can
then be removed via a collecting pressure connecting piece (not
shown). The pump can be completely housed in an outer housing.
[0072] The exchange of a diaphragm 2 will be described in more
detail below. In this case, the operating state of the pump is
assumed, which is shown in FIGS. 6 and 7. The armature 3 is not
driven during the diaphragm exchange. The coils 11 are without
current.
[0073] In this operating state of the pump, the armature 3 is
moveable along its displacement path. The actuating devices 32 or
the fixing devices 33 are in each case in their release position or
non-fixing position. The openings 41 are oriented in such a way
that the armature 3 can pass through them. The openings 41 and the
armature 3 have a common centre plane.
[0074] The actuating devices 32 are to be manually pivoted from
their release position about the centre axis 34 into their fixing
position. The actuating devices 32 can be pivoted simultaneously or
consecutively. The actuating handles 36, which allow a simple and
reliable force transmission, are to be used for the manual pivoting
of the actuating devices 32. The pivoting of the actuating devices
32 leads to a corresponding pivoting of the fixing devices 33 about
the centre axis 34 from their release position into their fixing
position.
[0075] A centring of the armature 3 firstly takes place. This
centring is shown in FIGS. 8 and 9. It takes place automatically
during the displacement of the fixing devices 33 from their release
position into their fixing position. The fixing devices 33 thus
also ensure a centring. The two centring flanks 48 of a fixing
device 33 come to rest synchronously on the armature 3. The
armature 3 preferably has corresponding engagement faces 51 for the
centring flanks 48. The engagement faces 51 are located in the
region of the longitudinal ends of the armature 3 and are
substantially perpendicular to the longitudinal centre axis 13. A
relative movement takes place between the engagement faces 51 and
the associated centring flanks 48. Because of the inclined course
of the centring flanks 48, the armature 3 is displaced from the
actuating device 32 which has just been actuated along the
longitudinal centre axis 13 in the direction of the other actuating
device 32. By actuating the two actuating devices 32, a centring of
the armature 3 takes place in the direction of the longitudinal
centre axis 13. Each fixing device 33 presses the armature 3 away
from it, which leads to a centring of the armature 3. The armature
3, after centring, is located centrally between the U-legs.
Furthermore, the centring flanks 48, during a centring of the
armature 3, also act in a direction which is perpendicular to the
longitudinal centre axis 13. The armature 3 is thus also radially
centred with respect to the longitudinal centre axis 13. The
further the actuating devices 32 or the fixing devices 33 are
pivoted into the fixing positions, the further the armature 3 is
displaced with respect to its position.
[0076] The diaphragms 2 fastened to the armature 3 prevent a
pivoting of the armature 3 about the longitudinal centre axis 13 on
actuation of the fixing devices 33. The centring flanks 48
furthermore prevent the armature 3 from carrying out a pivoting
movement about the longitudinal centre axis 13 upon actuation of
the fixing devices 33.
[0077] The fixing devices 33 then reach their fixing positions.
These are shown in FIGS. 10 and 11. The contact faces 47 then rest
flat on the longitudinal ends of the armature 3 and thus secure
these axially. The openings 41 and the armature 3 are no longer
oriented one after the other or with respect to one another. The
armature 3 can no longer pass through the openings 41. The spring
arms 50 prevent the fixing devices 33 being able to be moved
unintentionally from their fixing position. They furthermore also
fix the armature 3. The spring arms 50, in this case, rest on the
armature 3. The diaphragms 2 can then be removed from the armature
3. The pump heads 18 are to be removed for this purpose.
[0078] Furthermore, the contact flanks 87 of a base body 39 then
rest laterally on the armature 3 on the opposing sides of the
armature 3. The contact flanks 87 of the two base bodies 39 are, in
this case, spaced apart in the axial direction along the
longitudinal centre axis 13. The contact flanks 87 prevent both a
rotation of the armature 3 about the longitudinal centre axis 13
and also prevent the latter approaching the coils 11. The contact
flanks 87 therefore form fixing parts, which fix the armature 3
transverse to its displacement path.
[0079] With a reverse actuation of the actuating devices 32, the
armature 3 is released again.
[0080] With reference to FIGS. 12 to 19, the second embodiment of
the invention will be described below. Identical components receive
the same reference numerals as in the first embodiment, to which
reference is hereby made. Structurally different, but functionally
similar components receive the same reference numerals with an "a"
thereafter. The essential difference between the first embodiment
and the second embodiment is the configuration of the actuating
devices 32a and the fixing devices 33a. The actuating devices 32a
and the fixing devices 33a are configured separately here.
[0081] The pump has two actuating devices 32a. Each actuating
device 32a has an actuating disc 52, which is circular and is
housed in the receiving space 8. The actuating handle 36 projects
radially from the actuating disc 52. The openings 41 axially pass
through the actuating discs 52, which are point-symmetrical. Each
actuating disc 52 has an outer face 37 and an inner face 38. Two
centring webs 53 each with a centring flank 48a project from each
inner face 38. The centring webs 53 extend curved in an arcuate
manner They each have uniform curvature and extend at a constant
spacing from the centre axis 34. Each centring web 53 borders on a
longitudinal side 44 or 45 of an opening 41. The centring webs 53
of an actuating device 32a are, in this case, arranged obliquely
opposing one another adjacent to the longitudinal ends 42, 43. The
centring flanks 48a extend obliquely to the inner face 38 and to
the centre axis 34.
[0082] Furthermore provided in each actuating disc 52 are two links
54, which issue from the inner face 38 thereof. The links 54 may be
groove-like. They can, however, also completely pass through the
actuating discs 52. The links 54 of an actuating device 32a are
arranged adjacent to the longitudinal sides 44 or 45. They oppose
one another obliquely. Each link 54 has a radially outer idling
portion 55, a link pin actuating portion 56 adjoining the idling
portion 55 and a radially inner fixing portion 57 adjoining the
link pin actuating portion 56. The fixing portions 57 are in each
case arranged adjacent to the openings 41. They run substantially
straight. Their spacing from the centre axis 34 is substantially
constant. Proceeding from the fixing portions 57, the spacing in
the link pin actuating portions 56 from the centre axis 34
increases greatly. The idling portions 55 again have a
substantially constant spacing from the centre axis 34.
[0083] The pump furthermore has two fixing devices 33a. Each fixing
device 33a in turn comprises two wedge mechanisms 58. Each wedge
mechanism 58 has an outer coupling wedge 59 and an inner gripping
wedge 60. A gripping wedge 60 is in each case associated with a
coupling wedge 59. These virtually form a wedge pair.
[0084] Each wedge mechanism 58 has a carrier 61. The carriers 61 in
each case comprise a fixing piece 68, which, when the pump is
assembled, has a screw 63 passing through it and is located
adjacent to the U-base 6. The screws 63 are screwed into the yokes
9, so the carriers 61 are also fixed to the yokes 9 thereby.
Different securing is alternatively possible.
[0085] Furthermore, each carrier 61 has a holder 64, which is
preferably configured in a rod-like manner and is connected to a
fixing piece 62. The holders 64 of a fixing device 33a run parallel
to one another. They extend parallel to the U-legs 7 and run away
from the fixing pieces 62 perpendicular to the U-base 6. A coupling
wedge 59 is fastened to each holder 64. Each coupling wedge 59 has
an obliquely running, free wedge face 65, which is remote from the
associated holder 64. The wedge faces 65 of a fixing device 33a
face one another. A link pin 71 is provided on each coupling wedge
59 and engages in the link 54 of the adjacent actuating device
32a.
[0086] The two holders 64 of a fixing device 33a are connected to
one another by two guide rods 66. The guide rods 66 extend parallel
to one another and substantially perpendicular to the holders 64.
They run parallel to the U-base 6 and to the U-legs 7. They are
fastened to the holders 64 in the region of the mutually opposing
longitudinal ends of the holders 64. The guide rods 66 extend at a
spacing from the longitudinal sides of the armature 3.
[0087] The gripping wedges 60 are displaceably guided along the
guide rods 66. They have corresponding guide recesses 67 for this.
Each gripping wedge 60 has an obliquely running wedge face 68,
which rests on the wedge face 65 of an associated coupling wedge
59. Furthermore, each gripping wedge 60 has a free, straight
gripping face 47a, which is arranged opposing the wedge face 68.
The wedge faces 47a form fixing parts to fix the armature 3. The
gripping faces 47a of a fixing device 33a face one another. At
least one spring element 70 is provided between the two gripping
wedges 60 of a fixing device 33a. A pressure helical spring, which
forms the spring element 70, is arranged here on each guide rod 66.
However, instead of helical pressure springs 70, leaf springs are
preferably provided. The helical pressure springs 70 are supported
on the gripping faces 47a of the gripping wedges 60 of a fixing
device 33a. The spring elements 70, when using, for example,
guiding T-grooves on the sliding wedge faces 65 of the coupling
wedges 59, can also be completely dispensed with.
[0088] The mode of functioning of the actuating devices 32a or the
fixing devices 33a will be described below. In this case, the
release position of the actuating devices 32a or the fixing devices
33a is assumed, which is shown in FIGS. 14 and 16. The gripping
faces 47a of the wedge mechanisms 58 are spaced apart from one
another there. The spacing of the gripping faces 47a from one
another is larger than the width of the armature 3. The armature 3
can move along the longitudinal centre axis 13. The armature 3 may
pass through the openings 41.
[0089] At least one actuating device 32a or fixing device 33a has
to be actuated to fix the armature 3. The actuating handle 36 is
preferably to be used for this. During an initial pivoting of an
actuating device 32a, the centring flanks 48a synchronously come to
rest on the adjacent longitudinal end of the armature 3, so the
armature 3 is displaced along its longitudinal centre axis 13. The
armature 3 is pressed in the direction of the other actuating
device 32a. The idling portion 55, in this case, moves past the
respective link pin 71. No forces are transmitted between the
respective link pin 71 and the links 54. The idling portions 55
thus have no actuating function. The fixing device 33a is not yet
actuated.
[0090] On a further pivoting of the actuating device 32a, the link
pin actuating portions 56 arrive at the respective link pin 71.
This is shown in FIGS. 17 and 18. A force transmission takes place
here between the link pin actuating portions 56 and the link pins
71. In this case, a relative movement takes place between the
mutually abutting wedge faces 65, 68. The gripping faces 47a
therefore approach one another. They also approach the armature 3,
which has already been centred and is now located between the
gripping faces 47a of the fixing devices 33a. When guiding the
gripping faces 47a of a fixing device 33a together, the spring
elements 70 are compressed.
[0091] The final fixed position is shown in FIG. 19. The gripping
faces 47a of a fixing device 33a rest laterally in a planar manner
on the armature 3 and oppose one another. They thus secure the
armature 3 locally. It is also centred in the process. A clamping
fixing is present here. The link pins 71 are in the fixing portions
57. They are fixed there. The fixing devices 33a ensure a fixing of
the armature 3 at two points which are spaced apart from one
another along the longitudinal centre axis 13. A front and a rear
fixing virtually takes place.
[0092] With a reverse actuation of the actuating devices 32a, the
armature 3 is released again in an analogous manner.
[0093] A third embodiment of the invention will be described below
with reference to FIGS. 20 to 25. Identical components receive the
same reference numerals as in the previous embodiments, to which
reference is hereby made. Structurally different but functionally
similar components receive the same reference numerals with a "b"
thereafter. Compared to the two previous embodiments, the actuating
devices 32b and the fixing devices 33b are configured differently.
The actuating devices 32b are similar to the actuating devices 32a
according to the second embodiment.
[0094] The pump has precisely one actuating device 32b.
Alternatively, however, two actuating devices 32b may also be
provided again. The actuating device 32b again has a circular
actuating disc 52b, which is again point-symmetrical with respect
to its centre axis 34. An actuating handle 36 projects radially
from the actuating disc 52b. The actuating disc 52b has an opening
41 passing through it on the end face. Furthermore, two links 54b,
are provided in the actuating disc 52b, which issue from the inner
face 38 thereof The links 54b may be groove-like. However, they may
also completely pass through the actuating disc 52b. The links 54b
extend in a curved manner around the centre axis 34.
[0095] Each link 54b has a link pin actuating portion 56b and a
radially inner fixing portion 57b. The link pin actuating portions
56b start in the region of the longitudinal ends 42 or 43 of the
opening 41. They extend according to FIG. 23 from the opening 41
clockwise and in the process approach the centre axis 34. The link
pin actuating portions 56b, in the region adjacent to the
longitudinal ends 42, 43, have a first radius of curvature, which
is larger than a second radius of curvature, which is present at
the inner end of the link pin actuating portions 56b. Adjoining the
inner end of the link pin actuating portions 56b are the fixing
portions 57b, which run straight and have substantially a constant
spacing from the centre axis 34.
[0096] The pump has two fixing devices 33b. Each fixing device 33b
has a carrier 61b, which is fastened by a fixing piece 62b to the
adjacent yoke 9. At least one guide rod 66b is fastened to each
fixing piece 62b. Two guide rods 66b are provided here per fixing
piece 62b and run parallel to one another. The guide rods 66b
extend parallel to the U-legs 7 and substantially perpendicular to
the U-base 6.
[0097] Two clamp-like, elongate fixing parts 47b are displaceably
guided on the guide rods 66b. The fixing parts 47b are configured
identically. Each fixing part 47b has two guide recesses 67b, which
have the guide rods 66b passing through them. The fixing parts 47b
in each case have an elongate groove-like or channel-like
encompassing receiver 75. The encompassing receivers 75 have
introduction openings 72, which oppose one another.
[0098] Each encompassing receiver 75 has two longitudinal sides and
two longitudinal ends 76. Provided on each longitudinal end 76 is a
centring flank 48b, which is configured as an oblique face and
axially limits the encompassing receiver 75. A centring flank 63,
which is configured as an oblique face and laterally limits the
encompassing receiver 75, is provided on each longitudinal side.
The centring flanks 48b oppose one another. The length of the
encompassing receivers 75 reduces from the outside to the inside in
the region of the centring flanks 48b. The centring flanks 73
oppose one another. The width of the encompassing receivers 75
reduces from the outside to the inside in the region of the
centring flanks 73.
[0099] Furthermore, an axially projecting link pin 71 is provided
on each longitudinal end 76 of a fixing part 47b. When the pump is
assembled, the link pins 71 engage in the links 54b.
[0100] The mode of functioning of the pump will be described in
more detail below. In this case, the operating position shown in
FIG. 22 is assumed. The fixing parts 47b are located there spaced
apart from the armature 3, so the latter is released and can move
along its longitudinal centre axis 13.
[0101] To change a diaphragm 2, the actuating device 32b has to be
pivoted by its actuating handle 36 about the centre axis 34. In
this case, the links 54b are also moved accordingly. A relative
movement takes place between the links 54b and the link pins 71.
The link pins 71 move along the link pin actuating portions 56b in
the direction of the fixing portions 57b. In this case, the fixing
parts 47b are actuated and moved toward one another along the guide
rods 66b, which is brought about by the link coupling. In the
fixing position, which is shown in FIG. 25, the fixing parts 47b
and the armature 3 are engaged. The two longitudinal sides of the
armature 3 are located in the encompassing receivers 75. In the
fixing position, the link pins 71 are locally secured in the fixing
portions 57b. The fixing devices 33b ensure fixing of the armature
3 at two points, which are spaced apart from one another along the
longitudinal centre axis 13. A front and a rear fixing virtually
takes place.
[0102] When the fixing parts 47b approach the armature 3, the
centring flanks 48b bring about a centring of the armature 3 along
the longitudinal centre axis 13. Furthermore, the centring flanks
73 bring about a centring of the armature 3 transversely to its
longitudinal centre axis 13.
[0103] A fourth embodiment of the invention will be described below
with reference to FIGS. 26 to 32. Identical components received the
same reference numerals as the previous embodiments, to which
reference is hereby made. Structurally different, but functionally
similar components receive the same reference numerals with a "c"
thereafter. Compared to the two previous embodiments, the actuating
devices 32c and the fixing devices 33c are configured
differently.
[0104] The pump comprises two actuating devices 32c and two fixing
devices 33c. Two fixing pieces 62c are provided here, which are
fastened, when the pump is assembled, adjacent to the U-base 6 on
the yokes 9. Two mutually parallel holders 64c are rigidly
connected to each fixing piece 62c and run away from the U-base 6
and in each case have a bearing opening 79 at their free end. The
holders 64c extend perpendicularly to the U-base 6. The bearing
openings 79 of a fixing device 33c have a common bearing axis,
which runs parallel to the U-base 6. A fixing part 47c is
displaceably guided parallel to the U-base 6 in each bearing
opening 79. The fixing parts 47c are in each case configured in a
pin-like or bolt-like manner, with them preferably being circular
in cross section. They in each case have an outer actuating end 80
and an inner fixing end 81 opposing the actuating end 80. The
fixing parts 47c taper conically in the region of their fixing ends
81 with the formation of centring parts 48c. In the region of the
actuating ends 80, the fixing parts 47c in each case have a
radially projecting head. A helical spring 82 is arranged on each
fixing part 47c. The latter in each case rests on the head of the
fixing part 47c and on the respective holder 64c and presses the
fixing part 47c outwardly or away from the respective holder
64c.
[0105] The actuating devices 32c are in each case annular. They in
each case have a radially projecting actuating handle 36. Two
control cams 54c, which are identically configured and run at the
edge on the respective actuating device 32c around the centre axis
34, are provided in each actuating device 32c. The control cams 54c
are open toward the centre axis 34. Each control cam 54c has a
control cam beginning 84 and a control cam end 85. The radial
spacing of the base face limiting the control cams 54c from the
centre axis 34 in each decrease from the control cam beginning 84
with the formation of a link pin actuating portion 56c in the
direction of the control cam end 85. The decrease can take place
regularly or irregularly.
[0106] Fixing recesses 86 are configured in the armature 3.
Provided in the region of each longitudinal end of the armature 3
are two fixing recesses 86, which oppose one another and have a
centre axis extending parallel to the U-base 6. The fixing recesses
86 are conically configured and are open toward the adjacent fixing
parts 47c. The fixing recesses 86 taper from the outside to the
inside.
[0107] When the pump is assembled, the heads of the fixing parts
47c rest on the inside of the control cams 54c. The heads are
pressed by the helical springs 82 onto the control cams 54c. The
fixing ends 81 of the fixing parts 47c of a fixing device 33c face
one another. The fixing parts 47c form link pins 71c.
[0108] The mode of functioning of the pump will be described in
more detail below. The starting point is FIG. 30 in this case.
According to FIG. 30, the armature 3 is released. The fixing ends
81 are spaced apart from the fixing recesses 86. During a pivoting
of the actuating devices 32c, the actuating ends 80 slide on the
control cams 54c. In this case, the fixing parts 47c are pressed
toward one another or in the direction of the armature 3 by the
control cams 54c in the link pin actuating portions 56c.
[0109] As emerges from FIG. 31, owing to the conical configuration
of the fixing parts 47c and the fixing recesses 86, a centring of
the armature 3 takes place on introduction of the fixing ends 81 in
the fixing recesses 86.
[0110] According to FIG. 32, the armature 3 is locally fixed. The
fixing parts 47c and the fixing recesses 86 have a positive
connection. The fixing devices 33c ensure a fixing of the armature
3 at two points, which are spaced apart from one another along the
longitudinal centre axis 13. A front and a rear fixing virtually
takes place.
* * * * *